Valid

YD/T 926.4-2025Information telecommunication generic cabling system - Part 4: Test methods for optical link and channel (English PDF)

信息通信综合布线系统第4部分：光链路及信道性能测试方法

Preview PDF

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for YD/T 926.4-2025 in 30 minutes.

Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

July 2, 2025

Implementation date

November 1, 2025

Scope

YD/T 926.4-2025 is the English-translated version of 信息通信综合布线系统第4部分：光链路及信道性能测试方法.

YD/T 926.4-2025 is the Chinese standard "Information telecommunication generic cabling system - Part 4: Test methods for optical link and channel". This standard specifies the test methods for optical link and channel attenuation, return loss, length, and delay performance in information and communication structured cabling systems.

This document applies to the testing of installed optical links and channels in information and communication structured cabling systems, or simulated link and channel models.

It was issued by Ministry of Industry and Information Technology. Issued on 2025-07-02, in force from 2025-11-01.

Found what you need?

Document preview — YD/T 926.4-2025

National Standard of the People's Republic of China

ICS: 33.040.50
Classification: M42

Issued by: Ministry of Industry and Information Technology

1 Foreword

YD/T 926.4-2025 was issued by Ministry of Industry and Information Technology on 2 July 2025 and has been in force since 1 November 2025.

It is one of 4 parts of the YD/T 926 series.

2 Scope

This standard specifies the test methods for optical link and channel attenuation, return loss, length, and delay performance in information and communication structured cabling systems. This document applies to the testing of installed optical links and channels in information and communication structured cabling systems, or simulated link and channel models.

3 About this standard

Sector: Telecommunication Industry Standard (Recommended)

Issued by: Ministry of Industry and Information Technology

English translation: about 15 pages (approximate)

4 Related standards

Other parts of this standard:

YD/T 926.2-2023 — Information and communication integrated wiring system - Part 2: General technical requirements for optical fiber cable wiring and connectors

YD/T 926.3-2024 — Information and communication integrated wiring system - Part 3: General technical requirements for symmetrical cable wiring and connectors

YD/T 926.5-2026 — Part 5: Electrical performance testing method

5 Classification and status

International classification (ICS): 33.040.50

Chinese Standard Classification (CCS): M 42

Prefix YD/T: recommended standard.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

How to Download YD/T 926.4-2025

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.